The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 24, 1987
Filed:
Nov. 19, 1984
William A Vitriol, Anaheim, CA (US);
Raymond L Brown, Riverside, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
We disclose a process for manufacturing multilayer circuit boards which includes providing a conductive, or an insulating substrate with a conductive pattern thereon, and then transferring and firing a glass-ceramic tape layer to the surface of the substrate. This tape layer provides both electrical isolation between the substrate and electrical conductors or electronic components which are subsequently bonded to or mounted on the top surface of the glass-ceramic tape layer. By providing vertical electrical conductors by means of vias in the tape layer prior to firing the tape layer directly on the substrate, good X and Y lateral dimensionally stability of the tape material is maintained. In addition, a high quality thick film glass-ceramic electrical interconnect structure is achieved at a relatively low manufacturing cost.